How can you use a specific row from a writable datasource in a subsequent test?

I created a writable datasource that is populated with anywhere from 5 to 20 rows of data in a REST GET command. In the next test, I would like to always use row number 5 of the datasource as a parameterized value in a POST command. Is there a way to do this. I have searched the help and have not been successful in finding a way to do this. Thanks

For "New Datasource," you do not have to provide the absolute path. Instead, provide the name of the Excel Datasource that you are using for that specific test. In a similar script for the example screenshot below, the line would be